The Moochmore girls are certain they suffer from some kind of undiagnosed neurotic mental issue - because after all, if they're not crazy then they're just unpopular. Unable to cope with her peculiar daughters and her unsupportive, philandering husband Barry, Shirley has a breakdown, living in the world of the Family Von Trapp and singing the songs from "The Sound of Music." When her delusions become too much to bear, Barry commits Shirley to a mental hospital and then finds himself alone with the five teenage daughter he barely knows. Desperate, he impulsively picks up an eccentric hitchhiker named Shaz, who becomes the girls' nanny and transforms their lives with her unconventional beliefs. Shaz is charismatic, hot tempered, inspiring and completely nuts. However, she proves to be exactly what the Moochmore family needs.